Strong cryptography in VFP 6.0
==============================

Also VCX is stable, this is only first version of documentation,
so it is very short ...

With this freeware VCX and DLL you are able to used _STRONG_ cryptography
in your application to encrypt and decrypt any string data.
Encryption algorithm used in this program is stronger than DES standard .

What you can do with CryptPak :
-------------------------------
ENCRYPT/DECRYPT - encrypts/decrypts string using strong BlowFish encryption algorithm
SHA1  - calculate SHA1 messsage digest for string passed as parameter
MD5   - calculate MD5 messsage digest for string passed as parameter
CRC32 - calculate 32-bit CRC (SYS(2007) calculates 16-bit CRC)

Usage
-----

Study and than run TestCryptPak.PRG - I have try to commented it for you.

Feel free to send any questions and comments to :
	kosina@vol.cz

I will also put this VCX on my WWW pages :
	http://jikos.uiv.cz/~milan/

Copyright :
-----------

This class library you can use in your applications freely.
But, my wife collects postcards, so, if you want to use it in your applications
or you want to obtain source code for this VCX, I (and my wife) would _enjoy_
to obtain postcard from your town, village or scenery from your country.
Thanks in advance.

	Milan Kosina
    Nad Mazankou 12/1124
    182 00 Praha 8
    Czech Republic

Best regards,
Milan

*****************************************************************************
Notes :
=======

VFP 6.0 and 5.0
-------------------
I have created this VCX in 6.0. There is no speciall code, so this VCX can
also be used on version 5.0, but currently is on my PC only 6.0, so sorry...

Description of BlowFish alorithm
--------------------------------

Description of BlowFish alorithm you can study on :
	http://www.counterpane.com/blowfish.html
On this page you can also see list of programs using Blowfish.

DLL
---

In this program I use freeware CryptPak.DLL created by Markus Hahn.
This DLL is available in sources and is freeely exportable. (But
sometimes it cannot be reexported from your country, so, please,
be carefull!)


Word from Markus Hahn - author of CryptPak.DLL :
------------------------------------------------
The whole package is freeware. You can use it as you like in
your own project. It is only forbidden to resell it as your
own product, even in a slightly changed form. Please contact
the author for further questions and suggestions.
	http://members.tripod.de/mchahn/software.html 
